Salted butter brown sugar vanilla extract graham crackers semi-sweet or dark chocolate chips mini marshmallows
Preheat the oven to 350° Fahrenheit, and line a 13×18 baking sheet with aluminum foil. Arrange the graham crackers on top in a single layer.
In a saucepan, melt the butter and brown sugar over medium heat. Bring the mixture to a rolling boil, and boil for 2-3 minutes or until thick, stirring constantly. Add the vanilla extract, and stir to combine.
Remove the baking sheet from the oven, and sprinkle the chocolate on top. Let it sit for 5 minutes or until melted, and use the spatula to spread it over the crackers in an even layer.
Sprinkle the marshmallows and crushed graham crackers on top. Transfer the baking sheet to the fridge to cool for 1-2 hours or until the chocolate has hardened.